and in this corner.....weighing 265 pounds..Folding Equity!!!!!

[A_PLUS]

The flop isnt getting called around as often as you seem to think. There is an Ace on the board, it is far from a given that a player without an Ace will call off 10% of his stack, being almost certain someone else has one.

One averagge, we can assume generously that we get one caller, when we just call.

so, pot will be 400 on the turn. SB has 550 behind.
If SB pushes, you can't make this call hoping for a call from the player behind you. The river card isnt exactly cheap when they are putting in either 1/2 or 1/3 of their remaining stack to call, and know they are up against at least one real hand after our overcall.

If we just call, we have to agree to give up on the turn, if he pushes.