SB Isolation play with big stack in the BB?

[Isura]

My hand is surely ahead of the short stack's range here, but I'm still alive with 3bb if I fold. Push here to try to isolate? If I fold, I'm 4th on the bubble or 5th with 3 other similar stacks. Thoughts?

#Game No : 2439255136
***** Hand History for Game 2439255136 *****
NL Texas Hold'em $30 Buy-in + $3 Entry Fee Trny:14338190 Level:7 Blinds(150/300) - Thursday, July 28, 18:25:33 EDT 2005
Table Table 11139 (Real Money)
Seat 1 is the button
Total number of players : 5
Seat 6: redman335 ( $465 )
Seat 3: HERO ( $1110 )
Seat 10: DDay1944 ( $1595 )
Seat 5: wildZer0 ( $3695 )
Seat 1: Smurfs ( $1135 )
Trny:14338190 Level:7
Blinds(150/300)
** Dealing down cards **
Dealt to HERO [ Kc Qc ]
>You have options at Table 12185 Table!.
redman335 is all-In [465]
DDay1944 folds.
Smurfs folds.
HERO ?