$11 ITM call with SS close to busting

[Perfection]

Seat 5 is the button.
Seat 5: Hero (4346 in chips)
Seat 6: Davebhoy (4556 in chips)
Seat 7: Mic121120 (1098 in chips)
Davebhoy: posts small blind 300
Mic121120: posts big blind 600

----- HOLE CARDS -----
dealt to Hero [K [img]/images/graemlins/club.gif[/img] A [img]/images/graemlins/heart.gif[/img]]
Hero raises to 1200
Davebhoy: raises to 4556 and is all-in
Mic121120: folds
Hero calls 3146

The SS in the BB has folded, leaving himself with 500 chips left. We are almost assured of second, but we have a strong hand 3 way.

I called because I thought there are only 2 hands im in horrible shape against, and I think hed do this with 77+ and hands down as far as A9 and KT.. (remember this is an $11, I think that is a realistic range) So im behind to 2, flipping with some and dominating others.

I dont know exactly how to calculate whether this is positive EV or not, help?

Is it close? Easy fold/call?