It is very possible, 3/4 of a mile is nothing to a mature buck, most will travel much farther than that. It is also possible, that there could be more than one mature buck in the area you describe. There may be more than one buck making sign in your hunting area, but it is likely he is the one or one of the deer making sign in your area. A couple years ago, I had game cams on different farms about a mile or a little more apart, and managed to get pictures of the same buck on a regular basis on both pieces of property, and sometimes on the same night, so he had to travel a little over a mile to get in front of both cams but he did. I also have video of 4 bucks in the summer in velvet and later in the year got game cam pics of two of these bucks two miles away, and even managed to tag on of them almost two miles form where I videoed them. They will travel.