If you want muscle gains, those cals are too low. You can still get those results with more cals but eating the right foods, get your cals from protein!
Eat every 2-3 hours, 20-30 grams protein per shot utilizing protein shakes, chicken and fish which are very
lean proteins especially the fish.
Use some mixed oil Omegas like Udos oil which actually helps for leaning as it is an efa, and helps other things like hair, nails, skin, interal organs.
Lots of multicolor veggies in a huge salad with dinner and lunch.
4-6 days for weights on some type of split will help as well.
Good luck, I am sure you will get your goal and have some great help here on the board with these wonderful moderators and members!
Linda