You should conside NiMH rechargeables for the better performance. I am a Wedding & Portrait photographer and am not totally used to using AA's except in my Fuji s602 (normally using all Canon pro-level kit).
The Fuji is about 4 or 5 years old and takes 4 x AA's. I have had no trouble using Duracells, getting about 3 days use per set (probably equating to up to about 750 shots at best guess).
However, there are a number of factors that will affect the life of a battery - how much zooming you do, how much flash you use, how long it is left switched on, how much reviewing and "in camera" editing you do, whether you upload to a PC/Laptop on battery power etc etc etc.
With these things in mind, you will only get a best-guess answer.
You could go to
www.dpreview.com where you might be able to find some specific data about your camera.
You should also check out
www.7dayshop.com for extremely cheap and ultra reliable rechargeable NiMH AA's at 2500mAh and higher (Duracells are around 1800mAh) for about £1 per battery. Believe me, I have totally road tested these, mainly in my Flashguns, they are absolutely superb and can be used hundreds of times.