WCOOP AKo 3-bet utg and get pushed back, your play?

[NYWalker]

WCOOP ME. My image is very tight. In the past, I 3-bet light and only did that with QQ/KK/AKs/AA. They were looked up twice and I won both. My showdowns says my 3-bet range is very tight. Villain is Fischer80, CL. His pf rasing range is OK. However, I saw he folded to 3-bet 4 out of 5 times when he raises, but not sure his utg raising range.

In this hand, please tell me your decision? What his pushing range?

PokerStars Game #12372298592: Tournament #70000023, $2500+$100 Hold'em No Limit - Level XXIII (12500/25000) - 2007/10/01 - 06:05:49 (ET)
Table '70000023 330' 9-max Seat #1 is the button
Seat 1: jcamby33 (2175500 in chips)
Seat 2: Indigoae (334253 in chips)
Seat 3: The Cooker (330107 in chips)
Seat 4: Fischer80 (3011704 in chips)
Seat 5: straate (1062473 in chips)
Seat 6: mpg1000 (1805996 in chips)
Seat 7: sandler1860 (735000 in chips)
Seat 8: jesse42782 (144254 in chips)
Seat 9: NYWalker (711820 in chips)

*** HOLE CARDS ***
Dealt to NYWalker [Ad Kc]
Fischer80: raises 65000 to 90000
straate: folds
mpg1000: folds
sandler1860: folds
sihuynh [observer] said, "SRAATE IS DA BESTTT"
jesse42782: folds
NYWalker: raises 180000 to 270000
jcamby33: folds
Indigoae: folds
The Cooker: folds
Fischer80: raises 1030000 to 1300000

????