Hi Jill, welcome to the forum!
I have an Olympus C-4000 and there's a nifty little feature in the menu...the C-4000's and the C-740's were pretty similar, so you may wish to check your menu(s) for this function...there's a manual color balance adjustment. You can bump the picture from heavy blues to heavy reds...I've often used it as a filter really. I'll bump it a tich into the reds when I'm shooting sunsets to make the pics look super-saturated.
I'm sure Bob's right about it being a white balance issue. If your 740 doesn't have any of the adjustments either of us have mentioned so far, you might even want to try playing with the white balance settings...i.e. the menu that changes your white balance for indoors shooting, flouresant, auto, etc.. Finally, if push comes to shove, the surest way to beat this issue is to get a small swatch of something that's a neutral grey (50% grey)...about the size of an index card and set your white balance to that. I've used a chunk of medium grey mat board from time to time...it works well and is sturdy enough to toss in your camera bag. Check your Olympus owners manual for how to manually set your white balance.
Let us know how it goes!