If you are not getting any roll... Then I'm guessing your ball flight is high (lots of spin) and you're ball is just ballooning into the sky, and dropping out of the sky due to gravity and not rolling? If your swing speed is truly 115mph... Let me ask you some questions...
1.) What loft is your D3 head?
2.) What setting do you have the 910 D3 at (A1 is neutral)?
3.) What shaft do you have?
Give us more data... I really doubt you'll hit a 913 D3 further just by taking the club off the rack from the average retailer. You need to be properly fit into the shaft to maximize distances.
With that being said, you will also want to consider your setup and swing path.
Watch this video...
Once you have the proper setup and path... Then watch this video and you can see where to hit the face of the driver to maximize distance.
I'm guessing that you have too much spin with your driver. You should hit up. Hit just above center - toe side hit which will help you hit a draw and maximize swing speed, maximizing ball speed and minimize spin. This equates to more distance.