Frilled Dragon cage? Will this be ok?

I have heard that some people use 4x2x2 foot cages for their lizard, so I was wondering if the 6 foot tall, 28 inch wide, 14 inch deep cage I have would work? Also as with all of my other pets the lizard would be spending much of it's time outside the cage. (i have all my other pets out at least 2 hours each daily, usually they are out the whole day getting attention and exploring all around the living room, supervised at all times) So would this cage size be okay? I plan on adding a few ledges for more horizontal space as well as much to climb on if this would be suitable.I had a feeling it wouldn't be enough floor room, but I wasn't sure if the height would make up for it as well as the lizard being out as much as it wants basically. I have heard they do better in more arboreal focused enclosures as well.