In a pop up breakers can be hard to find.. however what you need to do is trace wires
Now.. You have one of two power inlet systems.. Either there is a cord, that passes through the wall, or there is a power "inlet" (it's like an outlet save it's a plug instead of a socket in most cases. In any case it is the place you hook up a cord)
If your have a hard wired cord... Well, the breakers are on the end of it, it's that simple, it runs direct to the breaker box. Just follow the cord
If you have an inlet.. Then see if you can spot the back side of the inlet.. and follow the wire that's attached there
You will find the breaker box quickly enough.