"Transmission fluid is recommended to be changes at 3000 miles"
Do you mean 30,000 miles? If a dealership, an independent mechanic, or an oil change place is recommending a transmission fluid change at 3,000 miles, I would suggest that you RUN away from that place and never return to it!
If you are referring to the usual 30k interval for transmission fluid changes on Japanese cars, I strongly suggest that you do it. While the filter replacement is apparently optional, replacement could help to ensure that your transmission performs well for many years. No car ever suffered from better maintenance than is recommended.