I was traveling north on I-75 near Naples Florida around 7:30 am in August 2013 when I saw this black object coming from the south traveling north at a very high rate of speed no more than 500 feet above the ground. It was black and had an arrowhead shape to it approximately 150 feet long and about 50 feet wide. The speed of the craft was something I have never seen before. I am a private pilot and seen a lot of aircraft but nothing like this. It was traveling at a very high rate of speed and if I had to guess it was between 700-800 mph but never made a sound or did it have any vapor trails. The craft came to a sudden stop and hovered for about 2 seconds and did a 90 degree turn to the west and ecelerated to the west out of sight in a matter of an instant, no exhaust fumes or heat signatures coming from the craft. During the time of this event the radio station I was listening to became staticky and fading in and out for about 30 seconds after the craft departed the area. I was never a believer of UFOs but this event made me rethink everything I have heard and questioned.