5/10 Blinds Battle - Good/Bad Call?

[Jesse Kidd]

5/10 NL

SB hasn't done anything remarkable, other than check call my flopped 2 pair of KQ on a 2 flush board and then fold to a 2/3 pot bet after a turn brick about 6 hands before. He seems a little on the aggressive side.

Folded to SB (700)who makes it 50
I call (terrible?) in BB (520)with 22

Flop ($100ish): 345 rainbow

He goes all in, I call.

Gross?

I figured decent outright bluff chance, and decent equity (40% or so?) even against a high pp. Folding felt really weak heads up, as I got about the best flop I could hope for that wasn't a set.