Volunteer activities

So, I understand that teachers want us to get involved in volunteer activities. I also think it is a good idea to be active within your major. However, volunteer is volunteer meaning you do it because you want to and not because you have to. For several of my classes this year at least three volunteer activities are mandatory, and it is really bugging me. I think that if a teacher requires you to take time out of class to do a requirement then they should owe you that time. I dont think volunteering for outside of class time activities should be mandatory. That creates so much more stress for the student who now has to balance work schedules, other classes, and other activities. It is sometimes very hard to find time to do these without having to give something else up. I personally am having a very hard time signing up for these "volunteer" task due to my class schedule. I have seven activities I have to volunteer for and I have no time at all.