Bullet TIme to Regular Speed

My wife and I went on a 90-minute airboat ride and I recorded the entire trip! Unfortunately I couldn't see the One X display in he bright sunlight. I evidently turned the camera on and recorded three 30-minute segments in Bullet TIme mode. At first, I thought I ruined the entire shoot, but

then realized the camera's pointed at us the entire time. But it plays back much too slow. It is possible to speed up the video in Premiere Pro so that it appears normal speed. I assume the camera recorded at a lower frame rate as well. What speed would I need to use to make it appear somewhat normal? Any help would be appreciated...