blind battle, fold , push or call?

***** Hand History for Game 3166604226 *****
NL Texas Hold'em $30 Buy-in + $3 Entry Fee Trny:18103106 Level:5 Blinds(75/150) - Thursday, December 08, 17:29:08 EDT 2005
Table Table 66964 (Real Money)
Seat 7 is the button
Total number of players : 6
Seat 8: bullbuddha ( $1020 )
Seat 7: HERO ( $1531 )
Seat 6: KINGSKORT ( $1263 )
Seat 9: slackeness ( $2913 )
Seat 4: Oxymoronic ( $1036 )
Seat 5: wmarquardt ( $237 )
Trny:18103106 Level:5
Blinds(75/150)
** Dealing down cards **
Dealt to HERo [ Ac 3c ]
Oxymoronic folds.
wmarquardt folds.
KINGSKORT folds.
HERO raises [400].
bullbuddha folds.
slackeness raises [500].
hero folds.
slackeness does not show cards.
slackeness wins 1125 chips



How should I have responded to this raise? I've stolen his blinds a few times but with ace high PF