Menu with switch creates loop

[ChrisSwings]

Hello, I am new programming and I have a problem that I cannot solve. I am making a menu with switch with void functions so that they only print a message when the case option is selected. The code compiles well, but the problem is that when I select any menu option, the message is printed over and over as if it were a loop that is not closed and I don't know why if void does not return and the case break is declared . Please help me, I just want the message to be printed once.
This is my code:

#include <iostream>
#include <stdio.h>
#include <stdlib.h>

using namespace std;

void Play(void);
void Instruciones(void);
void Creditos(void);
void Salir(void);

void f_menu(){
	int opcion;
	
		cout<<"\n\n\t\t\t\t    PLAY"<<endl;
		cout<<"\n\n\t\t\t\tINSTRUCCIONES"<<endl;
		cout<<"\n\n\t\t\t\t  CREDITOS"<<endl;
		cout<<"\n\n\t\t\t\t   SALIR"<<endl;
		cout<<"\n\nPRESIONE 5 PARA RETROCEDER"<<endl;
		cin>>opcion;
	
	do{
		
		if(opcion==5){
			cout<<"Chau.";
			break;
		}
		switch(opcion){
			case 1: Play();break;
			case 2: Instruciones();break;
			case 3: Creditos();break;
			case 4: Salir();break;
			default: cout<<"Opcion incorrecta."<<endl; break;
		}
	}while(true);	
}
void Play(){
	cout<<"El juego empezo..."<<endl;
}

void Instruciones(){
	cout<<"El jugador debe..."<<endl;
}

void Creditos(void){
	cout<<"By..."<<endl;
}

void Salir(){
    cout<<"Salio..."<<endl;
}

int main()
{
    f_menu();
    return 0;
}

[againtry]

#include <iostream>
#include <stdio.h>
#include <stdlib.h>

using namespace std;

void Play(void);
void Instruciones(void);
void Creditos(void);
void Salir(void);

void f_menu()
{
    int opcion{0};
    while(opcion != 5)
    {
        cout<<"1 PLAY"<<endl;
        cout<<"2 INSTRUCCIONES"<<endl;
        cout<<"3 CREDITOS"<<endl;
        cout<<"4 SALIR"<<endl;
        cout<<"5 PRESIONE 5 PARA RETROCEDER"<<endl;
        cin>>opcion;
        
        switch(opcion)
        {
            case 1:
                Play();
                break;
            case 2:
                Instruciones();
                break;
            case 3:
                Creditos();
                break;
            case 4:
                Salir();
                break;
            case 5:
                return;
            default:
                cout<<"Opcion incorrecta."<<endl;
                break;
        }
    }
    return;
}

void Play()
{
    cout<<"El juego empezo..."<<endl;
}

void Instruciones()
{
    cout<<"El jugador debe..."<<endl;
}

void Creditos(void)
{
    cout<<"By..."<<endl;
}

void Salir()
{
    cout<<"Salio..."<<endl;
}

int main()
{
    f_menu();
    
    return 0;
}