Parents want me to be a doctor or something medical.

I’m a freshmen in college. I’ve always wanted to be a pilot. I really don’t want to be a doctor. My parents are cracking down forcing me to take pre-med courses because they want me to go into Anesthesiology. I know I need to get good grades but they are really being annoying and pushy about it. My father is paying for all my schooling, so I’m not sure what to do. I don’t wanna lose that free education. I feel like it’s my life and it’s my decision but they keep telling me everyone has to make sacrifices and this is how it is for immigrants. They came here for a better life and want the best for me. I feel really bad but at the same time I want to be a pilot. What do I do?