Running in addition to all your boxing training, while hypo caloric is a good way to burn up your muscle and leave you weak, with little stamina. You should already have plenty of wind, so running, in my opinion is a big waste of time. You should be adding an activity that will either increase you boxing skills (sparring/focus pad/ heavybag work) or increasing strength and explosiveness (weightlifting/ HIIT)
I personally would hit the weights, doing powercleans, snatches, pushpresses etc. Keep the reps low, and the weight heavy. Maintain your muscle mass, and drop some fat (if you have any to lose).
Try to get within 5 pounds and then drop water.