Yes. The Air Force offers several opportunities to do so. In many cases you can request an educational delay. This delay between the time of commissioning and reporting for active duty will be of sufficient length to allow you to fulfill the requirements for a professional or masters degree. You will assume all financial obligations. There are also Air Force Institute of Technology programs where the Air Force pays for your graduate school education. These programs are explained in detail in Air Force ROTC. Additional information can be found here.