Derelict Spaceship Survival

You wake up finding you staring at your reflection on a glass window above you. You have no idea how you got here and your last memory is going to bed. Upon looking around, you find yourself in a large room filled with pods like the one you currently reside in. All are filled with the mummified or rotting remains of their occupants.

The door to your pod opens and you immediately hear a warning, "Life support failure. Approximately two hundred and forty-three minutes until estimated oxygen supply goes below levels required for survival."