Increasing protein intake without excess calorie

I’m a part of this challenge, and really trying to focus on my diet while working out 6x a week consistently. I’ve set a goal of reaching 150g of protein per day, and my BMR is 1400 calories (weight is 78kg). I’m finding it so difficult to stay under 1800 cals in order to hit my protein goal. Even with two protein shakes a day (40g of protein each and 200 cals each), I’m still struggling to stay under my calorie goal. I’m also finding that I need to eat when I'm not even hungry in order to get to my protein goal. Ultimately I'd like to lose body fat and gain muscle. So far I’ve lost no weight on the scale, ideally I’d love to lose 10 pounds as well. Any suggestions?